Furnace



R. MOODIE.

FURNACE.

APPLICATION FILED NOV. 26. 1920.

Patented May 23, 1922.

6 SHEETS-SHEET I.

w v/v 70/2.

ATfoAA/E R. P- MOODIE.

FURNACE.

APPL'ICATION FILED Nov. 26, 1920.

patented May 23, 1922,

6 SHEETS-SHEET 2.

'W/W I/YVE/VTOR.

ATTORNEY.

R. P. MOOD IE.

FURNACE. APPLICATION FILED NOV. 26. I920.

I Patented May 23, 1922 R. P. MODDIE. FURNACE.

APPLICATION FILED NOV. 26, 1920.

Patented May 23, 1922.

6 SHEET SSHEET 4.

R. P. MOQDIE.

' FURNACE. v APPLICATION FILED NOV- 26, 1920- Patented May 23, 1922.-

6 SHEETS-SHEET 5- UNITED STATES PATENT OFFICE.

ROBERT P. MOODIE, OF OTTAWA, ONTARIO, CANADA, ASSIGNOR 0J3 QNE-THiRD TO WILLIAM HENRY MCINTYRE AND ONE-THIRD TO ADOLPHE'A'LFRED DION, OF

OTTAWA, ONTARIO, CANADA.

FURNACE.

Specification of Letters Patent.

Patented May 23, 1922.

Application filed November 26, 1920. Serial No. 426,573.

To (J7 ?fl/(OWI- may concern:

Be it known that 1, ROBERT P. Moonin, a citizen of the Dominion of Canada, residing at Ottawa, in the county of Carleton and Province of Ontario, have invented certain new and useful improvements in Furnaces, of which the following :is a specification.

The present invention has relation to im provements in heat generating furnaces and pertains more particularly to the type of electric heating apparatus, wherein the caloric is produced by electrically heating a series of core laminations and subsequently maintaining the temperature, after the source of energy has been shut off.

The principal object of the invention is to provide a furnace which derives its heating influence frouihighly heatedcore elements and in which the temperature of the furnace is maintained for a predetermined period, after the discontinuation of the electric energy.

A further object is to provide for the circulation of water entirely around the heating element and the subsequent utilization of the same, as a heating medium for buildings and the like.

i. still further object is to provide a water heating system in which the heating medium consists of a plurality of electrically heated grids, so positioned with relation to the furnace, as to retain the high temperature value after the current has been switched off.

l l ith these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter fully described. illustrated in the accompanying drawings, and pointed out in the claims hereunto appended l1 igure 1 is a longitudinal vertical section the improved furnace on line a-a of i.

is a horizontal section on line 3 is a horizontal section on line 0-0 h i l.

Fig i a top plan view of Fig. 1 with the cover plate and mineral packing removed.

utilization ,of electricity as a heating medium is becoming an economic necessity. Likewlse, great cleanliness of maintenance is effected, due to the elimlnatlon of smoke, soot and coal ashes and further the economic factor is argumented, by reason of the simple operation of electric furnaces, for the atten tion of which a qualified engineer is not necessary.

Further, an electric heating furnace may be heated to the desired degree and the caloric. may be maintained at even temperature for some time after the heating current is discontinued, thereby effecting a saving of fuel supply.

Likewise, there will be effected economy in electric energy by only utilizing the energy at stated times for the heating of the furnace. The current so utilized is taken from the supply after the peak load has been reduced. i

As will be understood, the kilowatt rate is computed upon the peak load each day and in the present apparatusthe current utilized is taken after the peak load has been lowered. I

As the utilization of water poweris be ,coming more predominant electrical energy at a greater decreased cost, will supersede advantage of this comparatively cheap and clean heating medium, I have provided a furnace which is indicated upon the drawings by the numeral 10.

The improved furnace comprises a concrete base 11, front and rear walls 12 and 13 and side walls 14 and 15. The walls are constructed preferably of two thicknesses of firebrick and a metallic top plate 16 is se cured to the walls at the upper end of the furnace by anchor bolts 17.

Disposed Within the interior ofthe furnace is a metallic casing 18, the wall plates of which are spaced from the walls of the furnace proper.

A reservoir or drum 19, is disposed wholly within the lower part of the casing 18 and rests upon the base 11, and a drun'i 20 is disposed in the upper end of said furnace above casing 18. 1

Pipes 21. communicate with the upper part of water druni l9 and extend upwardly in spaced relation therefrom and are connected together by the threeuvzr unions E22 and 23 and short pipes 2% at two sides and ti e three-way unions and 2e and the short pipes 27, on the opposite two sides. The unions 25 are connected to a three-way union 28, and a pipe connection 29 leads to a tourway union 30. This union :1) is connected by pipe 31, to a similar union 52 and said unions 30 and are connected by pipes 333 with the tour way unions 23. A. pipe connection 34 connects union 3), with a tourway union 35, which at the sides is con nected to the unions 26 which are in turn connected to short pipes 27, and end unions 22. The above unions and pipes term a manifold above the pipes 21.

A large pipe 36 has elbow connection 3'? with a pipe 38 and pipe 38 is in turn connected by the elbow 39 to one post oi? a globe valve t0, having a slip connection 41 which opens directly into the torward end (it the upper reservoir or drum 20.

Large pipes 42. 4:3, and and smaller pipes L5 and 4.5 lead into and cormininicate with the interior oi the lower drum 1?) and are connected to the tour-way unions -16, t' l, 48, 1-9 and ii). A. series o't' units of seven vertical pipes 50, extend in spaced relation at three sides of the :turnace between the cas' ing 18 and the inner walls ot the said turnace. The first mentioned pipes are coni'lected together by unions 5'1. and 52 and short pipes 53 and are similarly connected at their upper ends by the unions 54-. and 55 and short pipes 56. Likewise the other pipes 50 comprising the units of tlnree are connected at their lower ends coupling pipes 57 and elbows 58. the coupling pipes 57 be ing connected to the tou'rwuy unions 41-9 and 49 while their upper ends are connected to the unions 59 and 60. elbows 61 and (32 and short pipes 63.

The unions 64-, G5 and 66 are connected to the pipe connections of the upper ends of each ot' the series of seven of pipes Pipes ()7, 68 and 69 open into three sides of the upper reservoir 20. while pipes 70 and '71 likewise open therein leading" from each of the units of three pipes 50.

W ater inlet pipes *2 and T3 have elbow connections is; and T5 with the vertical pipes 76 and 77. entering throunl'i the bottom of the lower reservoir l9. T ese pipes lead from a suitable water supply and wat is constantly entering reservoir 19 an circulating upwarifll tln'iiiugh the pipes 2 and 5f).

Disposed centrally ot the e e and mounted on the fibre s pports the top of the lower reservoir 19, are the grids T9 preferably constructed of grey cast iron. These grids or laininat'ions T9, are in the term oi? continuous horizaontally disposed elongated rectungular bars having their alternate ends bent inwardly and welded to the inwardly bent end of the next succeedinp; grid. llilicsi-i grids T9 are held in spaced l'tHiliJlOil. by strips 8t) 0t vulco-as l'iestos. The grid units are assembled in juxtaposed relation as illustrated in Fig. i, and the end o't each alternating, bar is welded to the alternating bar of the next succccding grid, and are spaced apart by the end stiips ill ot vulco-usbestus. This stack oi grids as heretotore stated is located centrally o the turnace and is entirely enclosed by the Jerticaliy disposed pipes 2i leaiiling tron: the top ot the lower rcscri'oir it). The tree end ill of the lower grid T9 is coiniectcd to a. cable 82 leading {F0111 the source oit electri "al supply or generator, and a cable 83 is connected on its inner end to the free end 8i oil the top grid. and leads bacl: to the said generator. Connected to the top of the upper reservoir or drum 20 by elbows 85 and 8t), are the hot water supply pipes 87 and 88 leading to the radiators in the structure to be heated.

the space within the using 1.8 surroinufling both the vertical pi iics 2i and the heating clement comprising the stack of grids is tilled with si icatc Sand which also contacts with the lower surl'nce oi the upper reservoir 20. 'lhc space between the furnace walls and the casing It) is packed with inurcrul wool 90. which likewise. is packed around the upper part ot reservoir 20.

The grids 79. are capable of" high resistance and consequently are heated to a high degree. and the heat radiations are primarily imparted to the water in the rcrtical pipes 21 which has passed upward troni the lower reservoir 19. its the water in pipes 21 at tains a relatively high temperature, passes upwardly through the manifold, formed by the elbo vs, unions and pipes, as heretofore descrilied and. through the large pipe 36 and connections into the upper reservoir 20.

lltleanwxile a portion (at the water troin the lower reservoir '1. 'i:ie'-::-ics outward y through the l: rgre pipes 1-2. at? and ll: and 4-5 and a" into the large pipes 50. and upwardly to conibin and pass through the upper la ge pipes (37. (38. 70 and Ti and iinal v enters the upper reservoir 2t During; the circulation oi the water in the manner stated. the temperature o l' the same has been and when it zninu les with the but we in i e u; xr reservoir it). it has attziini-sd approxinnite v ti c same degree t'nnperaiurc. hot w: ter then passes I'll pcs and se to the radiatm's ieaied.

*1. ever pipe. union and coupling through which the water is circulated is subjected to the influence of the heat generated in and radiated from the grids 79.

For the control of the circuits leading from the source of electrical supply, 1 pro vide as schematically illustrated in Fig. 0, the following system: A large transformer 91. comprises the primary and Secondary windings 92 and'93. The main lead 9t from the generator 95, is connected to the primary winding 92 of the transformer 91, and the said generator is likewise connected to return lead 96 which is in turn connected to a switch 97, the contacts of which immersed in oil. A lead 98 passes from the other terminal of the switch 97 and is connected to the other terminal of the trans former coil Cables 82 and 83 leading to and from the heating grids 7 9 are connected to the terminals of the secondary transformer winding 93. The current from the generator normally passes through the lead 94 and energizes the primary coil92, of the transformer and returns through wire 98,

switch 97 and lead 96 to the generator to complete the circuit. The secondary coil is energized by the primary coil and the current is passed through cable 82 to the heating element comprising the grids 79, and back through the cable 83 to the other terminal of the secondary winding 9?,- and completes the circuit.

A thermostatic metal bar 99, extends through the furnace above the grid stack and has its rear end loosely mounted in a retaining member 100 secured to the rear wall 13 of the furnace.

The free end of bar ,99 is slidably mounted in the front wall 13 of the furnace, and passes through a fibre plate 101, secured in any appropriate manner to the outer surface of the front wall of the furnace. This thermostatic bar 99 is capable of expansion and contraction by the heat generated in the furnace.

1V hen the bar 99 reaches a predetermined temperature, the same will expand longitudinally and move outwardly against the blade 102 oil? a contact switch 103.

This switch103 connected by wire 10% with a relay 105 and the current passes through the relay cell 106 and through wire- ].07 to the return terminal of the secondary coil 108 of the control transformer 109. A wire 110 leads from the out terminal of the secondary coil 108, and is connected to the lower terminal. of the contact switch 103.

when the relay 105 is energized the armature 111 is movedinwardly of the coil 106 and contact bar 1l2 engages the terminals 11%. causing a current to flow over wire 11-2 to the secondary coil 108 of the control trans former. From the other terminal 1 T3 the current flows throu hwire 115 tothecoil 116 of the oil switch 97. The current then passes through wire 117 to the terminal of the secondary coil of the control transformer 109, thus com 'ileting the circuit. The coil 116 of the oil switch 97 is thus energized and resultantly the armature 117 is elevated and breaks the main circuit leading from the generator.

For turning on the current at a predetermined time, I employ a time switch 119, one terminalof which is connected to one of the terminals 113 of the relay 105, by a wire 119 and the wire 114; leads to the secondary winding 108 of control transformer 109. The other terminal of the 01001: switch 118 is connected by wire 121, the terminal of the coil 116 of oil switch 97 and the current returns through wire 117 to the secondary winding 108 of the control transformer 109.

For regulating the flow of hot water from the inner vertical pipes 21 to the upper reservoir or drum 20 1 provide a thermostatic device comprising the metallic blades 122 and 123 which are welded together and secured by rivets 124 to the upper wall of the TGSEIF the boiling point, will expand and actuate the valve 40 and close the same against the entrance of the water to the reservoir. The

lowering of the temperature of the water would likewise act to open the valve.

It is obvious, that l have provided a furnace. wherein heating element is maintained at desired temperature. and in which, the caloric is retained for a maximinn period after the current has beencut ofl'. Result antly, this heat is stored within the furnace and utilized for heating the water within the reservoirs, pipes and the connections therefor. 1

For reinforcing the lower reservoir 19 at its central part, I have n-ovided postslQT which are arranged directly under the grid stacln These grids 79, comprising the heating elements, are preferably constructed of some good rheostatic metal. such as grey cast iron and are separated by heat retaining insulating strips, as heretofore described.

From the foregoing it thought that the construction of my invent' n will be clearly understood, anch therefore. a more extended explanation has been omitted.

hat I claim as newis:

1. A heat generating furnace comprising a. casing, water reservoirs mounted within said casing and connected with a water sup ply, heat generating elements arranged in said casing. a series of pipes connectin said reservoirs and surrounding saic heat generating elements and means for heating said elements.

2. A heat generating furnace comprising a casing, water reservoirs arranged within said casings water inlet and outlets communicating with said rt-rservoirs, a plurality of water pi pcs connecting said reservoirs, a series of metal grids surrounded by said water pipes, said grids conne "ted with a source of electric supply :lor heating the water in said pipes and said reservoirs, and means for heating a secondary supply of w a te r.

A heat generating furnace comprising a casing, water reservoirs arranged with in said casings water inlet and outlets communicat iog with said reseii'voirs, plurality 0!? water pipes connecting said reservoirs, a series oi? metallic grids surrounded by said water pipes, said grids connected with a source of electric siiipply for heating the water in said pipes and said reservoirs, means for hea ting a secondary supply or" water and means for uniting the secondary heated water with the water from said reservoir for circulation through a heating system.

4. A hot water generating system, the combination with a tiurnace including a cold water supply, of a water receiving rer-ieivoir arranged in said furnace, a hot water reser: voir, pipes connecting said reservoirs, a plural ity of heat generating members surrounded by said pipes, insulating elements disposed between said generating members, a source of electric energy :lor heating said genera ting members and means for circulating the heated water from said pipes to the hot water reservoir.

5. A hot water generating system, the con1- bination with a furnace including a cold water supply, o'l a water receiving reservoir arranged in said furnace, a hot water reservoir, pipes connecting said reservoirs, a plurality oi heat generating members surrounded by said pipes, insulating elements arranged between said heat generating members, a source of electric energy for heating said generating members, means for circulating the heated water from said pipes to the hot water reservoir, and a secondary water heating system associated with the first mentioned system.

6. A hot water generating system, the combination with a furnace including the water supply, a cold water receiving reservoir, a hot water receiving reservoir, pipes leading from the cold water reservoir to the hotwater reservoir, a series of metal plates arranged in said :turn ace and surrounded by said pipes, insulating elements interposed between said plates, means for heating said plates and means for heating the water in circulation through said pipes.

i. A hot water generating system, the combination with a furnace including the water supply, a cold Water receiving reservoir, a hot water receiving reservoir, pipes leading from the cold water reservoir to the hot water reservoir, a series of metal grids arranged in said furnace and surrounded by said. pipes, insulating elements interposed between said grids, means for heating said grids, means for heating the water in circulation through said pipes, and pipes connected to said furnace for holding a secondary supply of water to be subjected to the said heating means.

8. An electric water heating :turnace comprising a casing, a reservoir communicating with the water supply, a hot water reservoir. a plurality of pipes connecting said rcservoirs, heat generating members surroumlei'i' by said pipes, insulating elements interposed between the said generating members, means for heating said generating members and means for heating an auxiliary supply of water for admixture with the water from the hot water reservoir.

9. An electric water heating system, the combination with a furnace including cold and hot water supply reservoirs, a plurality cl pipes connecting said reservoirs, a series oi? metallic grids arranged in juxtaposed relation between said pipes, said grids adapted to be electrically energized tor hcatii'lg said pipes andv reservoirs, pipes connected to said reservoirs and adapted to be heated to lurnish auxiliary hot water for admixture with the water from the hot water reservoir.

1 0. An electric heating system for buildings, comprising a casing, a reservoir coin-- muuicating with the water sumply, a hot water reservoir arranged in said casing, a plurality oi. pipes connecting said resmwoirs, a column of metal grids disposed between said reservoirs and surrouiuled by said pipes, said grids adapted to be electrically energized after the peak load of the electrical supply, to maintain the temperature of the circulating medium in the furnace, and the said circulating medium being circulated through the building to distribute its heat units and returning to said furnace.

11. An electric water heating furnace tor buildings comprising a casing, a reservoir communicating with water supply pipes, 21 hot water reservoir, a ilurality of vertical pipes connecting said reservoirs, pipes connected to the hot water reservoir and leading to the heating system of the building, by pass pipes connected to the inlet and outlet pipes, a water column disposed within said citsing and connected to said by pass pipes, a 'ilurality oi? grids surrounded by said ver tical pipes, said grids adapted to be heated by an electrical supply and means for heat ing the water in its circulation from the inlet reservoir to the outlet reservoir.

An electric water heating furnace for buildings comprising a casing, a reservoir communicating with water supply pipes, 21 hot Water reservoir, a plurality of vertical pipes connecting said reservoirs. pipes connected to the hot water reservoir and leading to the heating system of the building, by pass pipes connected to the inlet and outlet pipes, a water column disposed within said casing and connected to said by pass pipes, a plurality of grids surrounded by said vertical pipes, said grids adapted to be heated by an electrical supply, means for heating the water in its circulation from the inlet reservoir to the outlet reservoir, and means for heating the water in said column and uniting it with the water from the outlet reservoir.

13. An electric water heating furnace comprising a casing, inlet and outlet reservoirs connected with a water supply, pipes connecting said reservoir, a plurality of metallic grids engaging said pipes, electric generating elements connected to said grids, said elements connected with a sourceof electrical supply, said grids adapted to be heated to a high degree by said elements, a heat absorbent packing completely surrounding said pipes and grids, and means for retaining the heat generated within said casing, after the electrical supply is cut off.

14. An electric water heating furnace comprising a casing, inlet and outlet reservoirs connected with a water supply, pipes connecting said reservoir, a plurality of metallic grids engaging said pipes, electric generating elements connected to said grids, said elements connected with a source of electrical supply, said grids adapted to be heated to a high degree by said elements, a heat absorbent packing completely surrounding said pipes and grids, means for retaining the heat generated within said casing, after the electrical supply is cut off, and means for heating an auxiliary water supply and uniting the same with the outlet supply from the outlet reservoir.

15, A water heating furnace comprising a casing, inlet and outlet reservoirs arranged in said casing, said inlet reservoir connected with inlet water supply pipes, the outlet reservoir connected to outlet pipes, a plurality of radially disposed pipes connecting said reservoirs, a plurality of rectangular metallic grids forming a column surrounded by and engaging said last mentioned pipes ,said grids being connected with a source of electric energy, a heat absorbing packing arranged Within said casing and surrounding said pipes and grids, by pass pipes connected to the inlet and outlet supply pipes, and a Water column arranged in said casing and connected with said by pass pipes, for circulating a supply of water through the casing to be heated by the said grids.

16. A water heating furnace comprising a casing, inlet and outlet reservoirs arranged in said casing, sald inlet reservoir connected with inlet water supply pipes, the outlet reservoir connected to outlet pipes, a plurality of adially disposed pipes connecting said reservoirs, a plurality of rectangular metallic grids forming a column surround ed by and engaging said last mentioned pipes connected to the inlet and outlet supply pipes, a water column arranged in said casing and connected with said by pass pipes, for circulating a supply of water through the casing to be heated by the said grids, and means for maintaining the temperature of the furnace after the electrical supply has been cut off.

. 17. A water heating furnace for structures, comprising a casing, a water inlet reservoir arranged in the base of said casing, an outlet reservoir arranged in the top of said casing, said inlet reservoir connected to inlet supply pipes, said outlet reservoir connected to the water circulation system of the structure, a plurality of pipes connecting said reservoirs, a series of grids, surrounded by said last mentioned pipes, said grids adapted to be heated by electrical energy, the water circulating through said last mentioned pipes adapted to be heated by said grids, a heat retaining packing surrounding said pipes and grids, a water column disposed in said casing and by pass pipes connecting said column with the inlet and outlet water supply pipes and the water in said column adapted to be heated and united with the outlet supply.

18. A furnace for hot water heating systems for structure comprising a casing, reservoirs arranged within said. casing, water inlet pipes connected to one of said reservoirs, water outlet pipes connecting the other of said reservoirs with the heating system of the structure to be heated pipes connecting said reservoirs, heating elements connected to a source of electrical energy, said last mentioned pipes surrounding said heating elements and means for insulating said heating elements.

19. A furnace for hot water heating systems, comprising a casing having a base, a water inlet reservoir mounted on said base, a hot water reservoir secured to the top of said casing, pipes connected to said inlet reservoir and leading to a water supply, pipes connected to the outlet reservoir and leading to the heating system, a series of pipes arranged within said casing and connecting said reservoirs, said pipes adapted for the circulation of water through the easing to be heated, a plurality of metallic grid plates enclosed. by said last mentioned pipes, said grid plates (:opnei'lied to :1 SUHIPC of electrical supply for heating; the same and a packing surrouiuling said pipes and grids and adapted to retain the heat alter the eleetrie energy has been out off.

20. A tui'nzu-e for hot Water heating systems Comprising a casing lisving a base, a water inlet reservoir mounted on said. base, a hot Water reservoir seemed to the top of said casing, pipes connected to said inlet reservoir and leading to a Water supply, pipes connected to the outlet reservoir and leading to the heating system, a series of pipes arranggecl Within said casing and conneeting said reservoirs, said pipes adapted for the circulation of water through the M. MGBLULLAN, E. LITLE. 

